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The LHCf Collaboration ITALY Firenze University and INFN: O.Adriani, L.Bonechi, M.Bongi, G.Castellini, R.D’Alessandro, P.Papini, S. Ricciarini, A. Viciani.

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Presentation on theme: "The LHCf Collaboration ITALY Firenze University and INFN: O.Adriani, L.Bonechi, M.Bongi, G.Castellini, R.D’Alessandro, P.Papini, S. Ricciarini, A. Viciani."— Presentation transcript:

1 The LHCf Collaboration ITALY Firenze University and INFN: O.Adriani, L.Bonechi, M.Bongi, G.Castellini, R.D’Alessandro, P.Papini, S. Ricciarini, A. Viciani Catania University and INFN: A.Tricomi JAPAN: STE Laboratory of Nagoya University: K.Fukui, Y.Itow, T.Mase, K.Masuda, Y.Matsubara,H.Matsumoto,H.Menjo, T.Sako, K.Taki, H.Watanabe Konan Univ. Kobe: Y.Muraki RISE Waseda Univ. Tokyo: K.Kasahara, M.Mizuishi,Y.Shimizu, S.Torii RISE Waseda Univ. Tokyo: K.Kasahara, M.Mizuishi, Y.Shimizu, S.Torii Shibaura Univ. Saitama: K.Yoshida Kanagawa Univ. Yokohama: T.Tamura SPAIN IFIC Valencia: A.Fauss, J.Velasco FRANCE Ecole Politechnique Paris: M. Haguenauer USA LBNL Berkeley: W. Turner CERN D.Macina, A.L. Perrot

2 ATLAS INTERACTION POINT (IP1) Beam line Detector II TungstenScintillator Silicon  -strips Detector I TungstenScintillator Scintillating fibers 140 m LHCf experimental method is based on 2 independent detectors installed on both sides of IP1 LHCf experiment Study of  0 and n production cross sections as functions of p T in the very forward region of LHC. Simulation of an atmospheric shower initiated by a 10 19 eV proton 00   n Calibration at high energy (LHC: 10 17 eV in the LAB frame) of Montecarlo codes used for the reconstruction of atmospheric showers produced by very high energy primary cosmic rays

3 The LHCf detectors scintillating fibers tungsten layers scintillators  -strip silicon layers scintillators tungsten layers ARM # 1 ARM #2 ~30cm 40  40 mm 2 20  20 mm 2 32  32 mm 2 25  25 mm 2 ~9cm

4 Arm #1  E/E<3%@200GeV <200  m spatial resolution  m/m = 5% Excellent tool to calibrate the energy measurement! Expected results  0 mass resolution  0 energy spectrum Model dependence of neutron energy distribution Arm #2  E/E<3%@200GeV <100  m spatial resolution Spatial resolution for Arm#2 Electrons 200GeV  =52  m

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